MK-16 13.5` GBB
MK-16 9.3` GBB
VIPER TECH M16/M16A2 20 Inch GBB
VIPER TECH MK-12 MOD 1 GBB (W/Crane Stock)
VIPER TECH MK-12 MOD 1 GBB
VIPER TECH M16/M16A1(M653) GBB
SR-15 Lower Receiver | SR-15 下槍身
MK-18 Lower Receiver (Sea Anchor) | MK-18 下槍身 (海錨刻字)
XM177 E2 Lower Receiver | XM177 E2 下槍身
XM177 Lower Receiver (CAMMANDO) | XM177 下槍身(CAMMANDO)
A1 Type Lower Receiver | A1 下槍身
M4 Type Lower Receiver | M4下槍身